/*
 * @Author: Clark
 * @Email: haixuanwoTxh@gmail.com
 * @Date: 2023-02-11 11:33:33
 * @LastEditors: Clark
 * @LastEditTime: 2023-02-15 12:48:08
 * @Description: file content
 */

#include "open.h"
#include <sys/uio.h> // struct iovec

// Open the file by sending the "name" and "oflag" to the
// connection server and reading a file descriptor back
int csopen(char *name, int oflag)
{
    int len;
    char buf[12];
    struct iovec iov[3];
    static int csfd = -1;

    if (csfd < 0)
    {
        if ((csfd = cli_conn(CS_OPEN)) < 0)
        {
            err_ret("cli_conn error");
            return -1;
        }
    }

    sprintf(buf, " %d", oflag);
    iov[0].iov_base = CL_OPEN " ";
    iov[0].iov_len = strlen(CL_OPEN) + 1;
    iov[1].iov_base = name;
    iov[1].iov_len  = strlen(name);
    iov[2].iov_base = buf;
    iov[2].iov_len = strlen(buf) + 1;
    len = iov[0].iov_len + iov[1].iov_len + iov[2].iov_len;

    if (writev(csfd, &iov[0], 3) != len)
    {
        err_ret("writev error");
        return -1;
    }

    return recv_fd(csfd, write);
}
